Alternative Method Of Describing Vertical Offset; Horizontal Position - Christie CP2000-XB Setup Manual

Section 2: Installation & Setup

Alternative Method of Describing Vertical Offset

Offset can also be specified as the distance traveled from lens center (such as 270 pixels) and expressed as a
percentage (270 pixels=50%) of half of the image height. This concept of image movement is illustrated in
Figure 2-14.
For any projector, if you find that you cannot raise or lower the image enough using mechanical vertical offset,
try adjusting V-Position in the Size and Position menu when displaying at less than the minimum size. If
images remain keystoned or exhibit uneven brightness, the projector may simply be too high or low in relation
to the screen. Relocate for optimized performance.

Horizontal Position

The Horizontal Position of the image can be offset—that is, shifted left or
right of lens center—using the Left/Right Offset buttons from the Main:
Lens menu. Starting with no offset, the 2048 x 1080 image from this
projector can be moved by a distance of 410 pixels, resulting in up to 70%
of the image displayed on one side of lens center (Figure 2-15).
Note that the positioning shown at right is often mistakenly referenced as
70% offset but it is not—it is 40% offset derived as 410/1024 x 100. A
70% offset is explained below and shown in Figure 2-16.
2-10
Figure 2-14 Example of Alternative Offset Specification
Figure 2-15 Horizontal Offset
Range
CP2000-XB Setup Guide
020-100250-02 Rev. 1 (06-2009)